Friction device for spools in cordage and twine making machines



(No Model.)

B. S. 82 J. B. HALE.

FRICTION DEVIGE FOR $POOLS IN GORDAGE AND TWINE MAKING MACHINES.

No 325,336. Patented Sept. 1, I885.

INVENTBHE .%m

- WITNESSES UNITED STATES PATENT rricn.

BERNICE HALE AND JAMES B. HALE, OF MALDEN, MASSACHUSETTS.

FRICTION DEVICE FOR SPOOLS IN CORDAGE AND TWINE MAKlNG MACHINES.

:EEFEGIFECATION forming part of Letters Patent No. 325,336, datedSeptember 1, 1885.

Application filed August 28, 1884.

To all 20720711, it may concern:

Be it known that we, BERN 10E S. HALE and Janus B. HALE, citizens of theUnited States, residing at Malden, in the county of Middlesex and Stateof Massachusetts, have invented an Improved Friction Device for Spoolsin Cordage and Twine Making Machines, of which the following is a full,clear, and exact descrip tion, reference being had to the accompanyingdrawings, making part of this specification, in which- Figure 1 is anelevation of a portion of a twisting-frame having our improved frictiondevice applied to the deadspindle of one of the take-up spools. Fig. 2is a vertical section of the friction device enlarged. Fig. 3 is avertical section representing a modification of our invention. 7

In twisting-frames as heretofore constructed, it is customary to apply acertain amount of friction to the spools as they are rotated by the yarnor cord carried by the flier in order to produce a proper degree oftension upon the yarn or cord as it is twisted by the rapid revolutionsof the flier. The friction device most commonly used consists of astationary leather strap passing around a pulley on the spindle whichsupports the spool, one end of said strap being permanently fixed, whilethe other end is made adjustable by means of a screw and nut, whereby itis caused to bear upon the pulley with more or less force, according tothe amount of friction desired. This device is, however, exceedinglyobjectionable, as the high velocity of the spindle generates a degree ofheat between the pulley and the friction-strap suiiicient to soon burnthe latter and render it worthless, while the starting up of the machineis attended with diflicnlty on account of the extra power required toovercome the friction of the straps above referred to.

Our invention has for its object to overcome these difficulties and toprovide a simple and efficient device which will produce the necessaryfriction to nicely regulate the tension upon the yarn or cord as it iswound onto the spool, and which is not liable to rapid destruction byheat, and will allow of the machine being started with much less powerthan is necessary with the friction devices hereto- (No model.)

belts passing from the different-sized portions of one pulley to theopposite pulley, whereby as the pulleys are rapidly revolved a gradualslip of one or both of the belts thereon is produced, and the requiredfriction thus created to retard the revolution of the spool, ashereinafter set forth.

In thesaid drawings, A represents atwistingframe; B, the flier, which isrotated by a belt passing around the whirl a, and (J the deadspindle,which is supported by the vertical bearing D, and at its lower end in asuitable step, b, and carries at its upper end the takeup spool G, whichis rotated, as usual, by the yarn or cord 0 as the latter is rapidlycarried around by the flier B to put in the twist. The spindle-step b islocated on the rail E, which is raised and lowered, as usual, bymechanism not shown, in order that the spool may be moved up and down toaccomplish the proper winding thereon of the yarn or cord. The spindle,spool, and flier above described are, however, all of the usualconstruction, and as they form no part of our present invention will notbe further particularly described.

o will now describe the friction device, by means of which the rotationof the spool G is retarded and the required tension put upon the yarn orcord 0.

To the spindle 0, near its bottom, is securely fixed a pulley, 11,having two portions, d e, of different diameters, and immediatelyopposite and in close proximity thereto is mounted on a vertical stud,f, rising from the movable rail E, or a slide adapted to move therein, asimilar pulley, I, which is placed in a position the reverse of thatoccupied by the pulley H, so that the larger portion of one pulley willbe opposite to or in line with the smaller portion of the other pulley.These two pulleys are connected by two parallel belts, g h, the upperone, 9, of which passes from the smaller portion, (1, of the pulley H tothe larger portion, k,'of the pulley I, while the lower belt, h,passesfrom the larger portion, e, of pulley H to the smaller portion, m, ofthe pulley I, and it will be apparent that as the spindle O is rotatedthe tendency of the belts will be to drive the two portions of eachpulley at different rates of speed; but as these two portions cannotmove independently of each other, it follows that one or both of thebelts must slip gradually and slowly on the pulleys as the latter arerunning at a high velocity, whereby a friction is produced that can beeasily governed and a uniform tension put upon the yarn or cord 0 as itis wound upon the spool G. Furthermore, as the slip of the belts ontheir pulleys is comparatively slow in proportion to the rate of speedof the latter, the liability of the belts being destroyed by heatproduced by excessive friction is avoided, and the durability of thefriction device thus greatly increased, whereby a considerable saving inthe cost of repairs is effected. A considerable saving in power is alsoeffected, as much less force is required in starting up the machine onaccount of the rolling motion of the straps over the pulleys, theinitial resistance to be overcome being much less than is the case witha stationary strap passing around a pulley, and consequently as themotion of the flier is communicated to the spool and its spindle throughthe yarn or cord, there is much less liability of the latter beingbroken on the starting up of the machine.

The studf is preferably secured to a slide, Z, which is moved insuitable guides in the rail E, by means of a screw, n, and by adjustingthe position of the slide 1, the tension of the belts g h can beregulated to increase or diminish the friction, as desired. Any othersuitable device for tightening the belts g 71 may, however, be employedinstead of the slide and screw.

Instead of two pulleys, H I, each having two portions of differentdiameters, one only may be so constructed, and the opposite pulley be ofuniform diameter throughout, as seen in Fig. 3, in which case the sameresult will be attained as before, except that the amount of slip of oneor both of the belts will be somewhat diminished.

What we claim as our invention, and desire to secure by Letters Patent,is-- 1. A spindle, a pulley rigidly secured thereto and having portionsof different diameters, in combination with a second pulley, a supporttherefor, and a pair of belts connecting both pulleys,substantially asdescribed, whereby the belt from the larger portion of the first pulleytends to revolve the second pulley faster than the belt from the smallerportion of the first pulley, and a gradual slip and friction occursduring rotation of the pulleys, substantially as shownand described.

2. A spindle, a pulley having portions of different diameters, incombination with a second pulley, a support for the same, and a pair ofparallel belts moving in the same direction and connecting the pulleys,substantially as described, whereby the belt from the larger portion ofthe first pulley tends to re volve the second pulley faster than thebelt from the smaller portion of the first pulley, and a gradual slipand friction occurs during the rotation of the pulleys, substantially asherein shown and described.

3. A spindle, a pulley having portions of different diameters, averticalstud and second pulley, and pair of belts connecting the two pulleys, incombination with a slide carrying the second pulley and a screw or otherequivalent device for adjusting the position of the slide, substantiallyas shown and described.

Witness our hands this 25th day of August, A. D. 1884.

BERNICE S.- HALE. JAMES B. HALE.

In presence of- P. E. TESCHEMAOHER, W'. J. CAMBRIDGE.

